Hi Everyone, am looking for the name of a film- made in the 1990's?!

The Film is about a teenage boy who either wins a Robot or gets bought it by his parents, the Robot is about the size of a dustbin, and its meant to fire plastic pellets as part of a game, but sucks up his marbles or ball bearings instead and charges itself up overnight, then goes wrong and starts firing at people, i think he takes it to school and then it goes wrong!?Www@Enter-QA@Com

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